AT&T MERLIN LEGEND Communications System Release 2.0 Maintenance And Troubleshooting Manual page 140

Control Unit Problems
Tools
diagonal pliers or wire strippers
Procedure
1. Insert the 8-pin plug of the telephone cord into an outlet on the floor
area.
2. Using diagonal pliers or wire strippers, cut off the end of the telephone
cord to expose the pairs.
3. Choose a single pair and untwist the wires.
4.
Extending from the bottom of the tone device are two clips. Attach one
wire from the pair you have chosen to each clip.
5. Turn on the switch on the outside of the tone device. You will hear a
high-pitched, alternating signal.
6.
Take the telephone handset and a 4-pair patch cord to the cross-
connect field between the control unit and the telephone.
7. Go to the blue field on the cross-connect field and, starting at the top
left corner, push the patch cord onto the first connecting block.
8. Using the diagonal pliers or wire strippers, cut off the other end of the
patch cord and expose the pairs. Do not cut off too much of the cord
because you'll need the length to test the top rows of the cross-
connect field.
The handset also has two clips with teeth that extend from its base.
9.
Attach the clip of the handset to the exposed wires of the patch cord.
Set the switch on the side of the handset to MONITOR.
10. Listen in the handset for the tone device signal.
11.
If you hear the signal, you have found the correct wires. Correctly label
both the cross-connect field and the outlet.
If you don't hear the signal, remove the patch cord from the connecting
12.
block and push the patch cord down onto the connecting block to the
right of the one just tested. Keep moving the patch cord to the next
connector block on the right until you find the pairs that carry the tone
device signal.
4-50 Module Problems